Each branch of the armed forces uses a simple bodyweight exercise to keep everyone in peak physical condition — they clearly understand the benefits of jumping jacks! While exercises like squats, ...

Whether you’re a jumping jack fanatic or you haven’t done a jumping jack since middle school gym class, there’s one thing (okay, two things) most of us can agree on: jumping jacks are fun (they make ...

FITBOOK author Nina Ponath loves challenges—this time: 10 days of jumping jacks. Photo: Getty Images / Antonio_Diaz; Collage: FITBOOK Jumping jacks in all variations–FITBOOK author Nina Ponath did at ...

You know the jumping jacks you hated to do in gym class? Turns out they're a highly effective calorie burner. So to keep things interesting, we reached out to Will Lanier, general manager and CrossFit ...

Look, I’m gonna be straight with you – those online calculators that tell you exactly how many jumping jacks you need to burn 500 calories? They’re basically making educated guesses about your body.

While you may not have thought about jumping jacks since grade school, the health benefits of this simple move continue well into adulthood. "Jumping jacks have a wealth of benefits like mobility, ...

Planks and jumping jacks are perfectly fine workout moves. But if you combine the two together, you can actually get an even better total-body workout. Meet: the plank jack! Plank jacks involve ...